body{padding-top: 150px; background-color: #191919;}

.header{z-index: 2;position: fixed;top: 0;left: 0;width: 100%; height: 150px;background-color: #191919;}

.search{z-index: 2; position: fixed; top: 8px;right: .8rem; left: .8rem;padding: 10px 19px;background-color: #d1d1d1;border-radius: 5px; }
.search .ipt{display: block;width: 100%; color: #858585;font-size: 15px;line-height: 18px;}

.tab{z-index: 2; position: fixed;top: 53px;left: 0;width: 100%;height: 100px;}
.tab .part{position: absolute;z-index: 1;height: 100%; width: 10000px;}
.tab .part .item{float: left;width: 7rem;padding-top: 47px; text-align: center;color: #ffffff; font-size: 18px; opacity: .5;}

.tab.hide{top: 0;}
.tab.hide .part .item{background: none;padding-top: 0;line-height: 40px;}
 
.tab .part .item.sele{ opacity: .8;}
.tab .part .item-1{background:url(../img/help/tab-1.png) no-repeat 50% 15px;background-size:21px auto;}
.tab .part .item-2{background:url(../img/help/tab-2.png) no-repeat 50% 15px;background-size:21px auto;}
.tab .part .item-3{background:url(../img/help/tab-3.png) no-repeat 50% 15px;background-size:21px auto;}
.tab .part .item-4{background:url(../img/help/tab-4.png) no-repeat 50% 13px;background-size:24px auto;}

.tab .point-group{position: absolute;bottom: 10px;left: 0;width: 100%;text-align: center;}
.tab .point-group .point{display: inline-block;width: 6px;height: 6px;margin: 0 2px; background-color: #383838;border-radius: 50%;}
.tab .point-group .point.active{background-color: #888888}

.list-area{z-index: 1; position: absolute;top: 150px;left: 0;bottom: 0;width: 100%; background-color: #1d1d1d;-webkit-transform: translateZ(0);transform: translateZ(0);-webkit-text-size-adjust: none;text-size-adjust: none;}
.list-area .item{padding: 0 .8rem; border-bottom: 1px solid #2f2f2f;font-size: 15px;}
.list-area .item .tit{padding: 13px 20px 12px 0; color: #a8a8a8; }
.list-area .item.active .tit{background:url(../img/help/arrow.png) no-repeat 100% 50%;background-size:12px auto;}
.list-area .item .cont-relative{position: relative;height: 0px;overflow: hidden;}
.list-area .item .cont{position: absolute;top: 0;left: 0;width: 100%; padding-bottom: 5px;}
.list-area .item .txt{color: #ffffff;opacity: .8;}
.list-area .item .url{color: #ff6700;line-height: 42px;}